translating tweaks

[lambda.git] / translating_between_OCaml_Scheme_and_Haskell.mdwn

diff --git a/translating_between_OCaml_Scheme_and_Haskell.mdwn b/translating_between_OCaml_Scheme_and_Haskell.mdwn
index e76bab4..4a4287a 100644 (file)
--- a/translating_between_OCaml_Scheme_and_Haskell.mdwn
+++ b/translating_between_OCaml_Scheme_and_Haskell.mdwn
@@ -131,7 +131,8 @@ Additionally, the syntax of OCaml and SML is superficially much closer to Haskel
 
        There is also a library for using *undelimited* continuations in OCaml, but it's shakier than Oleg's delimited continuation library.
 
-We won't say any more about translating to and from Scheme.
+There are some more hints about Scheme [here](/assignment8/) and [here](/week1/). We won't say any more here.
+
 
 
 #Haskell and OCaml#
@@ -198,6 +199,12 @@ We will however try to give some general advice about how to translate between O
                type person = name * address;;
                type 'a personal_data = PD of 'a;;
 
+*      When a type only has a single variant, as with PersonalData, Haskell programmers will often use the same name for both the type and the value constructor, like this:
+
+               data PersonalData a = PersonalData a
+
+       The interpreter can always tell from the context when you're using the type name and when you're using the value constructor.
+
 *      The type constructors discussed above took simple types as arguments. In Haskell, types are also allowed to take *type constructors* as arguments:
 
                data BarType t = Bint (t Integer) | Bstring (t string)